Doing so fails, it does not respond to clicks of any of the "hot buttons" on the youtube site. including "save to" just says loading... loading... loading... whereas in safari latest version it just works. i cant add favorites or communicate in youtube using webkit nightly. i will try to backtrace to an older version that worked.
bug is present in r62241
bug is NOT present in r61670
i have reverted to 61670 and refuse all updates until this is confirmed fixed.
*** This bug has been marked as a duplicate of bug 41622 ***